diff --git a/src/gui/ALAddTimerTaskDialog.py b/src/gui/ALAddTimerTaskDialog.py
index 0dbb01c..a21fa80 100644
--- a/src/gui/ALAddTimerTaskDialog.py
+++ b/src/gui/ALAddTimerTaskDialog.py
@@ -36,6 +36,7 @@ class TimerTaskStatus(Enum):
     READY = "已就绪"
     RUNNING = "执行中"
     EXECUTED = "已执行"
+    ERROR = "执行失败"
     OUTDATED = "已过期"
 
 
diff --git a/src/gui/ALTimerTaskWidget.py b/src/gui/ALTimerTaskWidget.py
index 1063f17..c656e49 100644
--- a/src/gui/ALTimerTaskWidget.py
+++ b/src/gui/ALTimerTaskWidget.py
@@ -94,6 +94,9 @@ class TimerTaskItemWidget(QWidget):
             case TimerTaskStatus.EXECUTED:
                 TaskStatusText = "已执行"
                 TaskStatusColor = "#4CAF50"
+            case TimerTaskStatus.ERROR:
+                TaskStatusText = "执行失败"
+                TaskStatusColor = "#FF5722"
             case TimerTaskStatus.OUTDATED:
                 TaskStatusText = "已过期"
                 TaskStatusColor = "#FF5722"
@@ -315,6 +318,7 @@ class ALTimerTaskWidget(QWidget, Ui_ALTimerTaskWidget):
         pending = 0
         in_queue = 0
         executed = 0
+        invalid = 0
         total = len(self.__timer_tasks)
         for timer_task in self.__timer_tasks:
             if timer_task["status"] == TimerTaskStatus.PENDING:
@@ -324,10 +328,14 @@ class ALTimerTaskWidget(QWidget, Ui_ALTimerTaskWidget):
                 in_queue += 1
             elif timer_task["status"] == TimerTaskStatus.EXECUTED:
                 executed += 1
+            elif timer_task["status"] == TimerTaskStatus.ERROR\
+            or timer_task["status"] == TimerTaskStatus.OUTDATED:
+                invalid += 1
         self.TotalTaskLabel.setText(f"总任务：{total}")
         self.PendingTaskLabel.setText(f"待执行：{pending}")
         self.InQueueTaskLabel.setText(f"队列中：{in_queue}")
         self.ExecutedTaskLabel.setText(f"已执行：{executed}")
+        self.InvalidTaskLabel.setText(f"无效的：{invalid}")
 
 
     def updateTimerTaskList(
@@ -470,3 +478,14 @@ class ALTimerTaskWidget(QWidget, Ui_ALTimerTaskWidget):
             if task["task_uuid"] == timer_task["task_uuid"]:
                 task["status"] = TimerTaskStatus.EXECUTED
         self.timerTasksChanged.emit()
+
+    @Slot(dict)
+    def onTimerTaskIsError(
+        self,
+        timer_task: dict
+    ):
+
+        for task in self.__timer_tasks:
+            if task["task_uuid"] == timer_task["task_uuid"]:
+                task["status"] = TimerTaskStatus.ERROR
+        self.timerTasksChanged.emit()
diff --git a/src/gui/ALTimerTaskWidget.ui b/src/gui/ALTimerTaskWidget.ui
index fb43171..363ead3 100644
--- a/src/gui/ALTimerTaskWidget.ui
+++ b/src/gui/ALTimerTaskWidget.ui
@@ -137,6 +137,30 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="InvalidTaskLabel">
+       <property name="minimumSize">
+        <size>
+         <width>70</width>
+         <height>25</height>
+        </size>
+       </property>
+       <property name="maximumSize">
+        <size>
+         <width>25</width>
+         <height>70</height>
+        </size>
+       </property>
+       <property name="styleSheet">
+        <string notr="true">QLabel {
+	color: #FF5722
+}</string>
+       </property>
+       <property name="text">
+        <string>无效的：0</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <widget class="QFrame" name="TimerTaskSpaceFrame">
        <property name="minimumSize">